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Daniel Macke5779992010-03-04 19:46:13 +01001#ifndef __USBAUDIO_CARD_H
2#define __USBAUDIO_CARD_H
3
4#define MAX_PACKS 20
5#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
6#define MAX_URBS 8
7#define SYNC_URBS 4 /* always four urbs for sync */
8#define MAX_QUEUE 24 /* try not to exceed this queue length, in ms */
9
10struct audioformat {
11 struct list_head list;
Clemens Ladisch015eb0b2010-03-04 19:46:15 +010012 u64 formats; /* ALSA format bits */
Daniel Macke5779992010-03-04 19:46:13 +010013 unsigned int channels; /* # channels */
14 unsigned int fmt_type; /* USB audio format type (1-3) */
15 unsigned int frame_size; /* samples per frame for non-audio */
16 int iface; /* interface number */
17 unsigned char altsetting; /* corresponding alternate setting */
18 unsigned char altset_idx; /* array index of altenate setting */
19 unsigned char attributes; /* corresponding attributes of cs endpoint */
20 unsigned char endpoint; /* endpoint */
21 unsigned char ep_attr; /* endpoint attributes */
22 unsigned char datainterval; /* log_2 of data packet interval */
23 unsigned int maxpacksize; /* max. packet size */
24 unsigned int rates; /* rate bitmasks */
25 unsigned int rate_min, rate_max; /* min/max rates */
26 unsigned int nr_rates; /* number of rate table entries */
27 unsigned int *rate_table; /* rate table */
Daniel Mack79f920f2010-05-31 14:51:31 +020028 unsigned char clock; /* associated clock */
Daniel Macke5779992010-03-04 19:46:13 +010029};
30
31struct snd_usb_substream;
32
33struct snd_urb_ctx {
34 struct urb *urb;
35 unsigned int buffer_size; /* size of data buffer, if data URB */
36 struct snd_usb_substream *subs;
37 int index; /* index for urb array */
38 int packets; /* number of packets per urb */
39};
40
41struct snd_urb_ops {
42 int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
43 int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
44 int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
45 int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
46};
47
48struct snd_usb_substream {
49 struct snd_usb_stream *stream;
50 struct usb_device *dev;
51 struct snd_pcm_substream *pcm_substream;
52 int direction; /* playback or capture */
53 int interface; /* current interface */
54 int endpoint; /* assigned endpoint */
55 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
56 unsigned int cur_rate; /* current rate (for hw_params callback) */
57 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
Clemens Ladische11b4e02010-03-04 19:46:14 +010058 unsigned int altset_idx; /* USB data format: index of alternate setting */
Daniel Macke5779992010-03-04 19:46:13 +010059 unsigned int datapipe; /* the data i/o pipe */
60 unsigned int syncpipe; /* 1 - async out or adaptive in */
61 unsigned int datainterval; /* log_2 of data packet interval */
62 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
63 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
64 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
65 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
66 unsigned int phase; /* phase accumulator */
67 unsigned int maxpacksize; /* max packet size in bytes */
68 unsigned int maxframesize; /* max packet size in frames */
69 unsigned int curpacksize; /* current packet size in bytes (for capture) */
70 unsigned int curframesize; /* current packet size in frames (for capture) */
71 unsigned int fill_max: 1; /* fill max packet size always */
72 unsigned int txfr_quirk:1; /* allow sub-frame alignment */
73 unsigned int fmt_type; /* USB audio format type (1-3) */
74
75 unsigned int running: 1; /* running status */
76
77 unsigned int hwptr_done; /* processed byte position in the buffer */
78 unsigned int transfer_done; /* processed frames since last period update */
79 unsigned long active_mask; /* bitmask of active urbs */
80 unsigned long unlink_mask; /* bitmask of unlinked urbs */
81
82 unsigned int nurbs; /* # urbs */
83 struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */
84 struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */
85 char *syncbuf; /* sync buffer for all sync URBs */
86 dma_addr_t sync_dma; /* DMA address of syncbuf */
87
88 u64 formats; /* format bitmasks (all or'ed) */
89 unsigned int num_formats; /* number of supported audio formats (list) */
90 struct list_head fmt_list; /* format list */
91 struct snd_pcm_hw_constraint_list rate_list; /* limited rates */
92 spinlock_t lock;
93
94 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
95};
96
97struct snd_usb_stream {
98 struct snd_usb_audio *chip;
99 struct snd_pcm *pcm;
100 int pcm_index;
101 unsigned int fmt_type; /* USB audio format type (1-3) */
102 struct snd_usb_substream substream[2];
103 struct list_head list;
104};
105
106#endif /* __USBAUDIO_CARD_H */